Why No Ancient Suez Canal?

Well actually there was an ancient canal, but it didn't follow the route of the modern canal. From an article on the Suez Canal:

"The idea of a canal linking the Mediterranean to the Red Sea dates back to ancient times. Unlike the modern Canal, earlier ones linked the Red Sea to the Nile, therefore forcing the ships to sail along the River on their journey from Europe to India. It has been suggested that the first Canal was dug during the reign of Tuthmosis III, although more solid evidence credits the Pharaoh Necho (Sixth Century BC) for the attempt. During the Persian invasion of Egypt, King Darius I ordered the Canal completed. The Red Sea Canal, consisted of two parts: the first linking the Gulf of Suez to the Great Bitter Lake, and the second connecting the Lake to one of the Nile branches in the Delta. The canal remained in good condition during the Ptolemaic era, but fell into disrepair afterwards. It was re-dug during the rule of the Roman Emperor Trajan, and later the Arab ruler Amr Ibn-Al-Aas."

So there was a canal that connected the Red Sea to the Nile instead of the Med. This makes sense if you are concerned about increasing trade between Egypt and the orient, but it doesn't do much for trade between Europe and Asia. If Europe lies outside your realm, there isn't much incentive for a canal along the modern route. Also, the Nile branch waterway tends to carry a great deal of silt, requiring continuous and expensive dredging of the canal and/or its periodic abandonment.

However, this begs the question as to why the Romans didn't attempt to dig a canal reaching the Med. The economic advantages to the empire as a whole should have been obvious. There may still be a problem with beach sand migration clogging the outlet, but this can be handled by rubble/rock jetties. A typical first century merchantman had a capacity of 100 to 150 tons, a length of 100 feet, a hull of 25 feet and a draft of 10 feet ("Warfleets of Antiquity" by R.B. Nelson). A canal with double the depth required for the ship's draft and double the width needed for two way shipping traffic would be 20 feet deep and have a bottom width of 100 feet. Assuming a 4 horizontal to 1 vertical side slope from the bottom to the surface (soil is assumed to be sands and silty sands), the top width would be 260 feet. The trapezoidal cross section for the channel would have an area of 3,600 square feet. The current canal route is approximately 122 miles (644,000 feet).

Assuming relatively flat terrain, the Romans would have to move 2,318,400,000 cubic feet (85,900,000 cubic yards) of dirt. This is an earth works project similar is scope (assuming I didn't make a bone-headed math mistake) to Hadrians Wall, and is much easier to build as digging a ditch is simpler and cheaper than building a masonry structure. It is certainly dwarfed by the Chinese Grand Canal and the Great Wall.

Though I don't have my crew productivity manual handy, which would give me the production rates for hand digging with pick and shovel, this seems like a job that would keep a legion busy for a few years to a decade. This would be in keeping with Roman army SOP which kept the legions busy during peace time building roads and aqueducts. The project is doable and economically beneficial.

So why no ancient Suez Canal?

3 Answers 2014-05-04

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The embassy of Sir Thomas Roe to the court of the Great Mogul, 1615-1619, as narrated in his journal and correspondence by Roe, Thomas, Sir, 1581?-1644; 1899; 363 pages

The embassy of Sir Thomas Roe to the court of the Great Mogul, 1615-1619, as narrated in his journal and correspondence by Roe, Thomas, Sir, 1581?-1644; 1899; 365 pages

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